SJCAM
SJCAM SJ30
SJCAM carried the SJ20's two-lens idea forward and gave each lens its own sensor and processing path — a 1/2-inch daylight sensor, and a 1/1.8-inch starlight sensor behind an f/1.8 lens for night — which is a more serious piece of engineering than the price suggests. The headline is 8K, and the honest reading of it is 8K at 20 fps — below the 24 fps that reads as motion, so it is a stills-adjacent mode rather than a usable video one; 4K60 is the real ceiling. What is unambiguously good is endurance: a 2000 mAh internal cell plus a 4200 mAh power handle gives a claimed seven hours at 4K30, which only SJCAM's own C400 beats here. Horizon lock is the 45-degree kind, which corrects lean but not rotation.
Sensor area against the rest of the catalogue
Derived from the standard optical-format table rather than copied off a spec sheet, because makers print a fraction that hides it. The table and the arithmetic.
Battery, with the small print
- Maker’s claim
- 7 h at 4K30 with the 4200 mAh power handle attached
- Third-party test
- None collected. We publish a tested figure only where a named outlet has run one and stated its conditions.
Specifications
Features
- ●1/2-inch daylight and 1/1.8-inch starlight sensors, each behind its own lens
- ●4K60 video, and an 8K mode at 20 fps
- ●SteadyMotion 2.0 with a 45° horizon lock
- ●2000 mAh internal battery plus a 4200 mAh power handle
- ●Waterproof to 5 m with no case, 30 m in the case
- ●Flip rear screen plus a front display
Strengths
- +Seven hours at 4K30 with the handle, second only to SJCAM's own C400 here
- +Two lenses with separate imaging chips, a real day-and-night system
- +5 m of bare waterproofing with no case
- +45° horizon lock, which most budget cameras omit entirely
Drawbacks
- −The 8K mode runs at 20 fps, below the frame rate that reads as motion
- −45° horizon lock corrects lean but not rotation, unlike a 360° lock
- −Launched in 2026, so there is no owner track record yet
- −Dual lenses mean two lens surfaces to scratch, neither of them replaceable
The strengths and drawbacks above are drawn from the manufacturer’s specifications and published reviews. No body of owner reports for this camera has been read, so nothing here claims to speak for its owners.
What owners say
No owner discussion has been collected for the SJCAM SJ30 yet. The pros and cons above come from the manufacturer’s specifications and published reviews. Rather than fill this space with invented sentiment, it stays empty until there is something real to put in it.
SJCAM SJ30, head to head
Cameras people look at alongside it
More from SJCAM →
SJCAM
SJCAM SJ20 Dual Lens
Two lenses on the front, and neither of them is for 360 capture. One is an f/2.0 daylight lens; the other is an f/1.3 night lens, and the camera switches between them. It and the newer SJ30 are the only cameras in this catalogue that answer low light with a second, faster lens rather than a bigger sensor or noise reduction, and for night riding or filming from a car that is a genuinely different answer. The cost shows up everywhere else: each lens sits on a small 1/2.8-inch sensor, 4K stops at 30 fps, the bitrate is 25 Mbps — the lowest figure in this catalogue, and low enough that fast motion visibly falls apart — and there is no horizon lock. It did surprise on endurance: in road.cc's four-camera drain test it stopped within three minutes of the DJI Osmo Action 5 Pro, about half an hour after the Insta360 Ace Pro 2.
SJCAM
SJCAM C400
A 54 g camera module that drops into a handle carrying a 3000 mAh battery and a big rotating screen — the same split-body idea as the DJI Osmo Nano and Insta360 GO Ultra, executed for well under their price. Seven hours and seventeen minutes at 4K30 with the handle attached is the number SJCAM leads with, and only its own SJ30 comes close. What it does not have is the sensor those two carry: 1/2.8-inch against their 1/1.3-inch and 1/1.28-inch, a quarter of the imaging area, which is the whole difference in low light. Nor is there bare waterproofing. Read this as a very long-running vlogging camera rather than a small flagship.
SJCAM
SJCAM C300
A pocket-shaped body rather than a GoPro-shaped one, and the whole design is organised around recording for hours: a 1000 mAh camera battery that clips into a 2800 mAh grip, for a claimed six hours at 4K30. That makes it a body-cam and vlogging tool more than a sports camera, which is how SJCAM markets it. Dual touch screens, six-axis gyro stabilisation, a 30 m case. The limits are the usual ones at $159 — 4K30 with no horizon lock, no bare waterproofing, and no published bitrate — plus a form factor that does not sit as well on a helmet as a standard action-camera body does.